3-chloro-2-methylpropanoyl chloride

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a slurry of 22.7 g. (0.17 mole) of anhydrous aluminum chloride and 9.6 g. (0.10 mole) of fluorobenzene is added 14.1 g. (0.10 mole) of β-chloroisobutyrylchloride over 30 minutes at 20°-25°C. The mixture is aged for 30 minutes at 20°-25°C and then quenched in ice. The product is extracted into hexane. The hexane layer is dried over anhydrous sodium sulfate and concentrated in vacuo to give 3-chloro-4'-fluoro-2-methylpropiophenone. quenched in ice The product is extracted into hexane The hexane layer is dried over anhydrous sodium sulfate concentrated in vacuo

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a slurry of 22.7 g. (0.17 mole) of anhydrous aluminum chloride and 9.6 g. (0.10 mole) of fluorobenzene is added 14.1 g. (0.10 mole) of β-chloroisobutyrylchloride over 30 minutes at 20°-25°C. The mixture is aged for 30 minutes at 20°-25°C and then quenched in ice. The product is extracted into hexane. The hexane layer is dried over anhydrous sodium sulfate and concentrated in vacuo to give 3-chloro-4'-fluoro-2-methylpropiophenone. quenched in ice The product is extracted into hexane The hexane layer is dried over anhydrous sodium sulfate concentrated in vacuo

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 24.8 g of 2-methoxy 5-acetyl aniline [obtained according to Oelschager Arzneimit. Forschung 8 532-539 (1958)] dissolved in 150 ml benzene are added with 10.6 g of 3-chloro isobutyric acid chloride in 40 ml benzene. The mixture is kept at room temperature for 2 hours under stirring then diluted with 250 ml water. The benzenic phase is separated. The aqueous phase is extracted twice with benzene. The benzenic solutions are united, washed with 2N hydrochloric acid and then with water, dried on sodium sulphate, filtered and evaporated to dryness. The residue is recrystallised from isopropyl ether from which 15.5 g or pure compound are recovered (yield = 77%) -1-(β-chloroα-methyl propionylamino) 2-methoxy 5-acetylbenzene melts at 92-97°. The benzenic phase is separated The aqueous phase is extracted twice with benzene washed with 2N hydrochloric acid with water, dried on sodium sulphate filtered evaporated to dryness The residue is recrystallised from isopropyl ether from which 15.5 g or pure compound are recovered (yield = 77%) -1-(β-chloroα-methyl propionylamino) 2-methoxy 5-acetylbenzene melts at 92-97°

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 24.8 g of 2-methoxy 5-acetyl aniline [obtained according to Oelschager Arzneimit. Forschung 8 532-539 (1958)] dissolved in 150 ml benzene are added with 10.6 g of 3-chloro isobutyric acid chloride in 40 ml benzene. The mixture is kept at room temperature for 2 hours under stirring then diluted with 250 ml water. The benzenic phase is separated. The aqueous phase is extracted twice with benzene. The benzenic solutions are united, washed with 2N hydrochloric acid and then with water, dried on sodium sulphate, filtered and evaporated to dryness. The residue is recrystallised from isopropyl ether from which 15.5 g or pure compound are recovered (yield = 77%) -1-(β-chloroα-methyl propionylamino) 2-methoxy 5-acetylbenzene melts at 92-97°. The benzenic phase is separated The aqueous phase is extracted twice with benzene washed with 2N hydrochloric acid with water, dried on sodium sulphate filtered evaporated to dryness The residue is recrystallised from isopropyl ether from which 15.5 g or pure compound are recovered (yield = 77%) -1-(β-chloroα-methyl propionylamino) 2-methoxy 5-acetylbenzene melts at 92-97°

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a slurry of 22.7 g. (0.17 mole) of anhydrous aluminum chloride and 9.6 g. (0.10 mole) of fluorobenzene is added 14.1 g. (0.10 mole) of β-chloroisobutyrylchloride over 30 minutes at 20° to 25°C. The mixture is aged for 30 minutes at 20° to 25°C and then quenched in ice. The product is extracted into hexane. The hexane layer is dried over anhydrous sodium sulfate and concentrated in vacuo to give 3-chloro-4'-fluoro-2-methylpropiophenone. quenched in ice The product is extracted into hexane The hexane layer is dried over anhydrous sodium sulfate concentrated in vacuo

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a slurry of 22.7 g. (0.17 mole) of anhydrous aluminum chloride and 9.6 g. (0.10 mole) of fluorobenzene is added 14.1 g. (0.10 mole) of β-chloroisobutyrylchloride over 30 minutes at 20° to 25°C. The mixture is aged for 30 minutes at 20° to 25°C and then quenched in ice. The product is extracted into hexane. The hexane layer is dried over anhydrous sodium sulfate and concentrated in vacuo to give 3-chloro-4'-fluoro-2-methylpropiophenone. quenched in ice The product is extracted into hexane The hexane layer is dried over anhydrous sodium sulfate concentrated in vacuo

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In 25 ml of methylene chloride was suspended 13.3 g of anhydrous aluminum chloride, and 7.3 g of 3-chloro-2-methylpropionyl chloride was added to the suspension with ice-cooling, after which 8.2 g of 3-benzylpyridine hydrochloride was added in small portions to the suspension. The resulting mixture was subjected to reaction with ice-cooling for 2 hours and then at room temperature for one hour. The reaction mixture was added in small portions to a mixture of 246 ml of iced water and 49 ml of methylene chloride, and the organic layer was separated, while the aqueous layer was extracted with 40 ml of methylene chloride. The organic layers were combined and then 80 ml of water was added thereto after which the resulting mixture was neutralized with sodium hydrogencarbonate. The organic layer was separated, washed with 50 ml of water, and thereafter dried over anhydrous magnesium sulfate. The solvent was removed by distillation under reduced pressure, and the residue thus obtained was purified by a column chromatography [Wako Silica Gel C-200, eluant: chloroform:ethyl acetate (1:1 by volume)] to obtain 10.53 g (yield 96.0%) of colorless, oily 3-[p-(3-chloro-2-methylpropionyl)benzyl]pyridine. was added to the suspension with ice- cooling The resulting mixture was subjected to reaction with ice- cooling for 2 hours the organic layer was separated, while the aqueous layer was extracted with 40 ml of methylene chloride 80 ml of water was added The organic layer was separated washed with 50 ml of water dried over anhydrous magnesium sulfate The solvent was removed by distillation under reduced pressure the residue thus obtained was purified by a column chromatography [Wako Silica Gel C-200, eluant: chloroform:ethyl acetate (1:1 by volume)]

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In 25 ml of methylene chloride was suspended 13.3 g of anhydrous aluminum chloride, and 7.3 g of 3-chloro-2-methylpropionyl chloride was added to the suspension with ice-cooling, after which 8.2 g of 3-benzylpyridine hydrochloride was added in small portions to the suspension. The resulting mixture was subjected to reaction with ice-cooling for 2 hours and then at room temperature for one hour. The reaction mixture was added in small portions to a mixture of 246 ml of iced water and 49 ml of methylene chloride, and the organic layer was separated, while the aqueous layer was extracted with 40 ml of methylene chloride. The organic layers were combined and then 80 ml of water was added thereto after which the resulting mixture was neutralized with sodium hydrogencarbonate. The organic layer was separated, washed with 50 ml of water, and thereafter dried over anhydrous magnesium sulfate. The solvent was removed by distillation under reduced pressure, and the residue thus obtained was purified by a column chromatography [Wako Silica Gel C-200, eluant: chloroform:ethyl acetate (1:1 by volume)] to obtain 10.53 g (yield 96.0%) of colorless, oily 3-[p-(3-chloro-2-methylpropionyl)benzyl]pyridine. was added to the suspension with ice- cooling The resulting mixture was subjected to reaction with ice- cooling for 2 hours the organic layer was separated, while the aqueous layer was extracted with 40 ml of methylene chloride 80 ml of water was added The organic layer was separated washed with 50 ml of water dried over anhydrous magnesium sulfate The solvent was removed by distillation under reduced pressure the residue thus obtained was purified by a column chromatography [Wako Silica Gel C-200, eluant: chloroform:ethyl acetate (1:1 by volume)]

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a slurry of 22.7 g. (0.17 mole) of anhydrous aluminum chloride and 9.6 g. (0.10 mole) of fluorobenzene is added 14.1 g. (0.10 mole) of β-chloroisobutyrylchloride over 30 minutes at 20°-25°C. The mixture is aged for 30 minutes at 20°-25°C and then quenched in ice. The product is extracted into hexane. The hexane layer is dried over anhydrous sodium sulfate and concentrated in vacuo to give 3-chloro-4'-fluoro-2-methylpropiophenone. quenched in ice The product is extracted into hexane The hexane layer is dried over anhydrous sodium sulfate concentrated in vacuo

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 24.8 g of 2-methoxy 5-acetyl aniline [obtained according to Oelschager Arzneimit. Forschung 8 532-539 (1958)] dissolved in 150 ml benzene are added with 10.6 g of 3-chloro isobutyric acid chloride in 40 ml benzene. The mixture is kept at room temperature for 2 hours under stirring then diluted with 250 ml water. The benzenic phase is separated. The aqueous phase is extracted twice with benzene. The benzenic solutions are united, washed with 2N hydrochloric acid and then with water, dried on sodium sulphate, filtered and evaporated to dryness. The residue is recrystallised from isopropyl ether from which 15.5 g of pure compound are recovered (yield = 77%) -1-(β-chloroα-methyl propionylamino) 2-methoxy 5-acetylbenzene melts at 92°-97°. The benzenic phase is separated The aqueous phase is extracted twice with benzene washed with 2N hydrochloric acid with water, dried on sodium sulphate filtered evaporated to dryness The residue is recrystallised from isopropyl ether from which 15.5 g of pure compound are recovered (yield = 77%) -1-(β-chloroα-methyl propionylamino) 2-methoxy 5-acetylbenzene melts at 92°-97°